git.sesse.net Git - mlt/blob - src/modules/gtk2/producer_pixbuf.c

   1 /*
   2  * producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_producer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_cache.h>
  24 #include <framework/mlt_log.h>
  25 #include <gdk-pixbuf/gdk-pixbuf.h>
  26
  27 #include "config.h"
  28
  29 #ifdef USE_EXIF
  30 #include <libexif/exif-data.h>
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <pthread.h>
  37 #include <math.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <unistd.h>
  41 #include <dirent.h>
  42
  43 // this protects concurrent access to gdk_pixbuf
  44 static pthread_mutex_t g_mutex = PTHREAD_MUTEX_INITIALIZER;
  45
  46 typedef struct producer_pixbuf_s *producer_pixbuf;
  47
  48 struct producer_pixbuf_s
  49 {
  50         struct mlt_producer_s parent;
  51
  52         // File name list
  53         mlt_properties filenames;
  54         int count;
  55         int image_idx;
  56         int pixbuf_idx;
  57         int width;
  58         int height;
  59         uint8_t *alpha;
  60         uint8_t *image;
  61         mlt_cache_item image_cache;
  62         mlt_cache_item alpha_cache;
  63         mlt_cache_item pixbuf_cache;
  64         GdkPixbuf *pixbuf;
  65         mlt_image_format format;
  66 };
  67
  68 static void load_filenames( producer_pixbuf self, mlt_properties producer_properties );
  69 static int refresh_pixbuf( producer_pixbuf self, mlt_frame frame );
  70 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
  71 static void producer_close( mlt_producer parent );
  72
  73 mlt_producer producer_pixbuf_init( char *filename )
  74 {
  75         producer_pixbuf self = calloc( sizeof( struct producer_pixbuf_s ), 1 );
  76         if ( self != NULL && mlt_producer_init( &self->parent, self ) == 0 )
  77         {
  78                 mlt_producer producer = &self->parent;
  79
  80                 // Get the properties interface
  81                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( &self->parent );
  82
  83                 // Callback registration
  84                 producer->get_frame = producer_get_frame;
  85                 producer->close = ( mlt_destructor )producer_close;
  86
  87                 // Set the default properties
  88                 mlt_properties_set( properties, "resource", filename );
  89                 mlt_properties_set_int( properties, "ttl", 25 );
  90                 mlt_properties_set_int( properties, "aspect_ratio", 1 );
  91                 mlt_properties_set_int( properties, "progressive", 1 );
  92
  93                 // Validate the resource
  94                 if ( filename )
  95                         load_filenames( self, properties );
  96                 if ( self->count )
  97                 {
  98                         mlt_frame frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
  99                         if ( frame )
 100                         {
 101                                 mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 102                                 mlt_properties_set_data( frame_properties, "producer_pixbuf", self, 0, NULL, NULL );
 103                                 mlt_frame_set_position( frame, mlt_producer_position( producer ) );
 104                                 mlt_properties_set_position( frame_properties, "pixbuf_position", mlt_producer_position( producer ) );
 105                                 refresh_pixbuf( self, frame );
 106                                 mlt_frame_close( frame );
 107                         }
 108                 }
 109                 if ( self->width == 0 )
 110                 {
 111                         producer_close( producer );
 112                         producer = NULL;
 113                 }
 114                 return producer;
 115         }
 116         free( self );
 117         return NULL;
 118 }
 119
 120 static int load_svg( producer_pixbuf self, mlt_properties properties, const char *filename )
 121 {
 122         int result = 0;
 123
 124         // Read xml string
 125         if ( strstr( filename, "<svg" ) )
 126         {
 127                 // Generate a temporary file for the svg
 128                 char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
 129                 int fd = g_mkstemp( fullname );
 130
 131                 if ( fd > -1 )
 132                 {
 133                         // Write the svg into the temp file
 134                         ssize_t remaining_bytes;
 135                         const char *xml = filename;
 136
 137                         // Strip leading crap
 138                         while ( xml[0] != '<' )
 139                                 xml++;
 140
 141                         remaining_bytes = strlen( xml );
 142                         while ( remaining_bytes > 0 )
 143                                 remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
 144                         close( fd );
 145
 146                         mlt_properties_set( self->filenames, "0", fullname );
 147
 148                         // Teehe - when the producer closes, delete the temp file and the space allo
 149                         mlt_properties_set_data( properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
 150                         result = 1;
 151                 }
 152         }
 153         return result;
 154 }
 155
 156 static int load_sequence( producer_pixbuf self, mlt_properties properties, const char *filename )
 157 {
 158         int result = 0;
 159
 160         // Obtain filenames with pattern
 161         if ( strchr( filename, '%' ) != NULL )
 162         {
 163                 // handle picture sequences
 164                 int i = mlt_properties_get_int( properties, "begin" );
 165                 int gap = 0;
 166                 char full[1024];
 167                 int keyvalue = 0;
 168                 char key[ 50 ];
 169
 170                 while ( gap < 100 )
 171                 {
 172                         struct stat buf;
 173                         snprintf( full, 1023, filename, i ++ );
 174                         if ( stat( full, &buf ) == 0 )
 175                         {
 176                                 sprintf( key, "%d", keyvalue ++ );
 177                                 mlt_properties_set( self->filenames, key, full );
 178                                 gap = 0;
 179                         }
 180                         else
 181                         {
 182                                 gap ++;
 183                         }
 184                 }
 185                 if ( mlt_properties_count( self->filenames ) > 0 )
 186                 {
 187                         mlt_properties_set_int( properties, "ttl", 1 );
 188                         result = 1;
 189                 }
 190         }
 191         return result;
 192 }
 193
 194 static int load_folder( producer_pixbuf self, mlt_properties properties, const char *filename )
 195 {
 196         int result = 0;
 197
 198         // Obtain filenames with folder
 199         if ( strstr( filename, "/.all." ) != NULL )
 200         {
 201                 char wildcard[ 1024 ];
 202                 char *dir_name = strdup( filename );
 203                 char *extension = strrchr( dir_name, '.' );
 204
 205                 *( strstr( dir_name, "/.all." ) + 1 ) = '\0';
 206                 sprintf( wildcard, "*%s", extension );
 207
 208                 mlt_properties_dir_list( self->filenames, dir_name, wildcard, 1 );
 209
 210                 free( dir_name );
 211                 result = 1;
 212         }
 213         return result;
 214 }
 215
 216 static void load_filenames( producer_pixbuf self, mlt_properties properties )
 217 {
 218         char *filename = mlt_properties_get( properties, "resource" );
 219         self->filenames = mlt_properties_new( );
 220
 221         if (!load_svg( self, properties, filename ) &&
 222                 !load_sequence( self, properties, filename ) &&
 223                 !load_folder( self, properties, filename ) )
 224         {
 225                 mlt_properties_set( self->filenames, "0", filename );
 226         }
 227         self->count = mlt_properties_count( self->filenames );
 228 }
 229
 230 static GdkPixbuf* reorient_with_exif( producer_pixbuf self, int image_idx, GdkPixbuf *pixbuf )
 231 {
 232 #ifdef USE_EXIF
 233         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( &self->parent );
 234         ExifData *d = exif_data_new_from_file( mlt_properties_get_value( self->filenames, image_idx ) );
 235         ExifEntry *entry;
 236         int exif_orientation = 0;
 237
 238         /* get orientation and rotate image accordingly if necessary */
 239         if (d)
 240         {
 241                 if ( ( entry = exif_content_get_entry ( d->ifd[EXIF_IFD_0], EXIF_TAG_ORIENTATION ) ) )
 242                         exif_orientation = exif_get_short (entry->data, exif_data_get_byte_order (d));
 243
 244                 /* Free the EXIF data */
 245                 exif_data_unref(d);
 246         }
 247
 248         // Remember EXIF value, might be useful for someone
 249         mlt_properties_set_int( producer_props, "_exif_orientation" , exif_orientation );
 250
 251         if ( exif_orientation > 1 )
 252         {
 253                 GdkPixbuf *processed = NULL;
 254                 GdkPixbufRotation matrix = GDK_PIXBUF_ROTATE_NONE;
 255
 256                 // Rotate image according to exif data
 257                 switch ( exif_orientation ) {
 258                   case 2:
 259                           processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 260                           break;
 261                   case 3:
 262                           matrix = GDK_PIXBUF_ROTATE_UPSIDEDOWN;
 263                           processed = pixbuf;
 264                           break;
 265                   case 4:
 266                           processed = gdk_pixbuf_flip ( pixbuf, FALSE );
 267                           break;
 268                   case 5:
 269                           matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 270                           processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 271                           break;
 272                   case 6:
 273                           matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 274                           processed = pixbuf;
 275                           break;
 276                   case 7:
 277                           matrix = GDK_PIXBUF_ROTATE_CLOCKWISE;
 278                           processed = gdk_pixbuf_flip ( pixbuf, TRUE );
 279                           break;
 280                   case 8:
 281                           matrix = GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE;
 282                           processed = pixbuf;
 283                           break;
 284                 }
 285                 if ( processed )
 286                 {
 287                         pixbuf = gdk_pixbuf_rotate_simple( processed, matrix );
 288                         g_object_unref( processed );
 289                 }
 290         }
 291 #endif
 292         return pixbuf;
 293 }
 294
 295 static int refresh_pixbuf( producer_pixbuf self, mlt_frame frame )
 296 {
 297         // Obtain properties of frame and producer
 298         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 299         mlt_producer producer = &self->parent;
 300         mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
 301
 302         // Check if user wants us to reload the image
 303         if ( mlt_properties_get_int( producer_props, "force_reload" ) )
 304         {
 305                 self->pixbuf = NULL;
 306                 self->image = NULL;
 307                 mlt_properties_set_int( producer_props, "force_reload", 0 );
 308         }
 309
 310         // Get the time to live for each frame
 311         double ttl = mlt_properties_get_int( producer_props, "ttl" );
 312
 313         // Get the original position of this frame
 314         mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
 315         position += mlt_producer_get_in( producer );
 316
 317         // Image index
 318         int current_idx = ( int )floor( ( double )position / ttl ) % self->count;
 319
 320         // Key for the cache
 321         char image_key[ 10 ];
 322         sprintf( image_key, "%d", current_idx );
 323
 324         int disable_exif = mlt_properties_get_int( producer_props, "disable_exif" );
 325
 326         if ( current_idx != self->pixbuf_idx )
 327                 self->pixbuf = NULL;
 328         if ( !self->pixbuf || mlt_properties_get_int( producer_props, "_disable_exif" ) != disable_exif )
 329         {
 330                 GError *error = NULL;
 331
 332                 self->image = NULL;
 333                 pthread_mutex_lock( &g_mutex );
 334                 self->pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( self->filenames, current_idx ), &error );
 335                 if ( self->pixbuf )
 336                 {
 337                         // Read the exif value for this file
 338                         if ( !disable_exif )
 339                                 self->pixbuf = reorient_with_exif( self, current_idx, self->pixbuf );
 340
 341                         // Register this pixbuf for destruction and reuse
 342                         mlt_cache_item_close( self->pixbuf_cache );
 343                         mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf", self->pixbuf, 0, ( mlt_destructor )g_object_unref );
 344                         self->pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 345                         self->pixbuf_idx = current_idx;
 346
 347                         // Store the width/height of the pixbuf temporarily
 348                         self->width = gdk_pixbuf_get_width( self->pixbuf );
 349                         self->height = gdk_pixbuf_get_height( self->pixbuf );
 350
 351                         mlt_events_block( producer_props, NULL );
 352                         mlt_properties_set_int( producer_props, "meta.media.width", self->width );
 353                         mlt_properties_set_int( producer_props, "meta.media.height", self->height );
 354                         mlt_properties_set_int( producer_props, "_disable_exif", disable_exif );
 355                         mlt_events_unblock( producer_props, NULL );
 356
 357                 }
 358                 pthread_mutex_unlock( &g_mutex );
 359         }
 360
 361         // Set width/height of frame
 362         mlt_properties_set_int( properties, "width", self->width );
 363         mlt_properties_set_int( properties, "height", self->height );
 364
 365         return current_idx;
 366 }
 367
 368 static void refresh_image( producer_pixbuf self, mlt_frame frame, mlt_image_format format, int width, int height )
 369 {
 370         // Obtain properties of frame and producer
 371         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 372         mlt_producer producer = &self->parent;
 373
 374         // Get index and pixbuf
 375         int current_idx = refresh_pixbuf( self, frame );
 376
 377         // optimization for subsequent iterations on single picture
 378         if ( current_idx != self->image_idx || width != self->width || height != self->height )
 379                 self->image = NULL;
 380         mlt_log_debug( MLT_PRODUCER_SERVICE( producer ), "image %p pixbuf %p idx %d current_idx %d pixbuf_idx %d width %d\n",
 381                 self->image, self->pixbuf, current_idx, self->image_idx, self->pixbuf_idx, width );
 382
 383         // If we have a pixbuf and we need an image
 384         if ( self->pixbuf && ( !self->image || ( format != mlt_image_none && format != self->format ) ) )
 385         {
 386                 char *interps = mlt_properties_get( properties, "rescale.interp" );
 387                 int interp = GDK_INTERP_BILINEAR;
 388
 389                 if ( strcmp( interps, "nearest" ) == 0 )
 390                         interp = GDK_INTERP_NEAREST;
 391                 else if ( strcmp( interps, "tiles" ) == 0 )
 392                         interp = GDK_INTERP_TILES;
 393                 else if ( strcmp( interps, "hyper" ) == 0 || strcmp( interps, "bicubic" ) == 0 )
 394                         interp = GDK_INTERP_HYPER;
 395
 396                 // Note - the original pixbuf is already safe and ready for destruction
 397                 pthread_mutex_lock( &g_mutex );
 398                 GdkPixbuf* pixbuf = gdk_pixbuf_scale_simple( self->pixbuf, width, height, interp );
 399
 400                 // Store width and height
 401                 self->width = width;
 402                 self->height = height;
 403
 404                 // Allocate/define image
 405                 int has_alpha = gdk_pixbuf_get_has_alpha( pixbuf );
 406                 int src_stride = gdk_pixbuf_get_rowstride( pixbuf );
 407                 int dst_stride = self->width * ( has_alpha ? 4 : 3 );
 408                 int image_size = dst_stride * ( height + 1 );
 409                 self->image = mlt_pool_alloc( image_size );
 410                 self->format = has_alpha ? mlt_image_rgb24a : mlt_image_rgb24;
 411
 412                 if ( src_stride != dst_stride )
 413                 {
 414                         int y = self->height;
 415                         uint8_t *src = gdk_pixbuf_get_pixels( pixbuf );
 416                         uint8_t *dst = self->image;
 417                         while ( y-- )
 418                         {
 419                                 memcpy( dst, src, dst_stride );
 420                                 dst += dst_stride;
 421                                 src += src_stride;
 422                         }
 423                 }
 424                 else
 425                 {
 426                         memcpy( self->image, gdk_pixbuf_get_pixels( pixbuf ), src_stride * height );
 427                 }
 428                 pthread_mutex_unlock( &g_mutex );
 429
 430                 // Convert image to requested format
 431                 if ( format != mlt_image_none && format != self->format )
 432                 {
 433                         uint8_t *buffer = NULL;
 434
 435                         // First, set the image so it can be converted when we get it
 436                         mlt_frame_replace_image( frame, self->image, self->format, width, height );
 437                         mlt_frame_set_image( frame, self->image, image_size, mlt_pool_release );
 438                         self->format = format;
 439
 440                         // get_image will do the format conversion
 441                         mlt_frame_get_image( frame, &buffer, &format, &width, &height, 0 );
 442
 443                         // cache copies of the image and alpha buffers
 444                         if ( buffer )
 445                         {
 446                                 image_size = mlt_image_format_size( format, width, height, NULL );
 447                                 self->image = mlt_pool_alloc( image_size );
 448                                 memcpy( self->image, buffer, image_size );
 449                         }
 450                         if ( ( buffer = mlt_frame_get_alpha_mask( frame ) ) )
 451                         {
 452                                 self->alpha = mlt_pool_alloc( width * height );
 453                                 memcpy( self->alpha, buffer, width * height );
 454                         }
 455                 }
 456
 457                 mlt_cache_item_close( self->image_cache );
 458                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image", self->image, image_size, mlt_pool_release );
 459                 self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 460                 self->image_idx = current_idx;
 461                 mlt_cache_item_close( self->alpha_cache );
 462                 mlt_service_cache_put( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha", self->alpha, width * height, mlt_pool_release );
 463                 self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha" );
 464
 465                 // Finished with pixbuf now
 466                 g_object_unref( pixbuf );
 467         }
 468
 469         // Set width/height of frame
 470         mlt_properties_set_int( properties, "width", self->width );
 471         mlt_properties_set_int( properties, "height", self->height );
 472 }
 473
 474 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 475 {
 476         int error = 0;
 477
 478         // Obtain properties of frame and producer
 479         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 480         producer_pixbuf self = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
 481         mlt_producer producer = &self->parent;
 482
 483         // Use the width and height suggested by the rescale filter because we can do our own scaling.
 484         *width = mlt_properties_get_int( properties, "rescale_width" );
 485         *height = mlt_properties_get_int( properties, "rescale_height" );
 486
 487         // Restore pixbuf and image
 488         mlt_service_lock( MLT_PRODUCER_SERVICE( producer ) );
 489         self->pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 490         self->pixbuf = mlt_cache_item_data( self->pixbuf_cache, NULL );
 491         self->image_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.image" );
 492         self->image = mlt_cache_item_data( self->image_cache, NULL );
 493         self->alpha_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.alpha" );
 494         self->alpha = mlt_cache_item_data( self->alpha_cache, NULL );
 495
 496         // Refresh the image
 497         refresh_image( self, frame, *format, *width, *height );
 498
 499         // Get width and height (may have changed during the refresh)
 500         *width = self->width;
 501         *height = self->height;
 502         *format = self->format;
 503
 504         // NB: Cloning is necessary with this producer (due to processing of images ahead of use)
 505         // The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
 506         if ( self->image )
 507         {
 508                 // Clone the image
 509                 int image_size = mlt_image_format_size( self->format, self->width, self->height, NULL );
 510                 uint8_t *image_copy = mlt_pool_alloc( image_size );
 511                 memcpy( image_copy, self->image, image_size );
 512                 // Now update properties so we free the copy after
 513                 mlt_frame_set_image( frame, image_copy, image_size, mlt_pool_release );
 514                 // We're going to pass the copy on
 515                 *buffer = image_copy;
 516                 mlt_log_debug( MLT_PRODUCER_SERVICE( &self->parent ), "%dx%d (%s)\n",
 517                         self->width, self->height, mlt_image_format_name( *format ) );
 518                 // Clone the alpha channel
 519                 if ( self->alpha )
 520                 {
 521                         image_copy = mlt_pool_alloc( self->width * self->height );
 522                         memcpy( image_copy, self->alpha, self->width * self->height );
 523                         mlt_frame_set_alpha( frame, image_copy, self->width * self->height, mlt_pool_release );
 524                 }
 525         }
 526         else
 527         {
 528                 error = 1;
 529         }
 530
 531         // Release references and locks
 532         mlt_cache_item_close( self->pixbuf_cache );
 533         mlt_cache_item_close( self->image_cache );
 534         mlt_cache_item_close( self->alpha_cache );
 535         mlt_service_unlock( MLT_PRODUCER_SERVICE( &self->parent ) );
 536
 537         return error;
 538 }
 539
 540 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 541 {
 542         // Get the real structure for this producer
 543         producer_pixbuf self = producer->child;
 544
 545         // Fetch the producers properties
 546         mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 547
 548         if ( self->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
 549                 load_filenames( self, producer_properties );
 550
 551         // Generate a frame
 552         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
 553
 554         if ( *frame != NULL && self->count > 0 )
 555         {
 556                 // Obtain properties of frame and producer
 557                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 558
 559                 // Set the producer on the frame properties
 560                 mlt_properties_set_data( properties, "producer_pixbuf", self, 0, NULL, NULL );
 561
 562                 // Update timecode on the frame we're creating
 563                 mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 564
 565                 // Ensure that we have a way to obtain the position in the get_image
 566                 mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
 567
 568                 // Refresh the pixbuf
 569                 self->pixbuf_cache = mlt_service_cache_get( MLT_PRODUCER_SERVICE( producer ), "pixbuf.pixbuf" );
 570                 self->pixbuf = mlt_cache_item_data( self->pixbuf_cache, NULL );
 571                 refresh_pixbuf( self, *frame );
 572                 mlt_cache_item_close( self->pixbuf_cache );
 573
 574                 // Set producer-specific frame properties
 575                 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
 576
 577                 double force_ratio = mlt_properties_get_double( producer_properties, "force_aspect_ratio" );
 578                 if ( force_ratio > 0.0 )
 579                         mlt_properties_set_double( properties, "aspect_ratio", force_ratio );
 580                 else
 581                         mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
 582
 583                 // Push the get_image method
 584                 mlt_frame_push_get_image( *frame, producer_get_image );
 585         }
 586
 587         // Calculate the next timecode
 588         mlt_producer_prepare_next( producer );
 589
 590         return 0;
 591 }
 592
 593 static void producer_close( mlt_producer parent )
 594 {
 595         producer_pixbuf self = parent->child;
 596         parent->close = NULL;
 597         mlt_service_cache_purge( MLT_PRODUCER_SERVICE(parent) );
 598         mlt_producer_close( parent );
 599         mlt_properties_close( self->filenames );
 600         free( self );
 601 }